Create a horizontal progress bar animation designed to overlay across the bottom
of a video. Bar is positioned at bottom of frame with 10% margin from edge. Starts
as empty gray outline with rounded ends. Four milestone markers are visible from
the start: "FIRST SWING" at 10%, "DAY 3" at 35%, "DAY 7" at 65%, and "DAY 14" at
100%. Markers are small circles with labels above them. Bar fil...
